Comparison of F2 and F∞ diallel analyses in barley

Genome ◽  
1988 ◽  
Vol 30 (6) ◽  
pp. 865-869 ◽  
Author(s):  
T. M. Choo ◽  
E. Reinbergs ◽  
P. Y. Jui
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Plant Height ◽  
Variance Components ◽  
Genetic Variance ◽  
Additive Genetic Variance ◽  
Heading Date ◽  
Diallel Analysis ◽  
Hordeum Vulgare L ◽  
Hill Plots

A study was conducted in barley (Hordeum vulgare L.) to compare the relative magnitudes of heterosis to additive × additive epistasis and to compare F2 and F∞, diallel analyses. Both F2 and F∞, progenies were derived from 7 × 7 diallel crosses. Progenies and their parents were evaluated for grain yield, heading date, plant height, and the number of spikes per hill in hill plots with five replications at Elora (Ontario) in 1978. Results suggested that additive × additive epistasis were present for these traits and its magnitude was similar to that of heterosis estimated in F2. Both F2 and F∞ analyses detected the presence of epistasis. Both analyses provided similar estimates of the additive genetic variance for heading date and the number of spikes per hill, but the F2 analysis provided higher estimates than the F∞ analysis for grain yield and plant height. The estimate for grain yield and plant height obtained from the F2 analysis could be biased upward because of the invalid assumption of no epistasis. Estimates of other genetic variance components from the F2 analysis could be biased also. The F∞ diallel analysis not only provided estimates of additive × additive genetic variance for the four traits, it also allowed detection of nonindependent gene distribution in the parents for three of the four traits. Therefore, the limitations of the F2 diallel analysis in the presence of epistasis were apparent in the study. The F2 diallel analysis, however, could be used to detect dominance and maternal effects and thus to complement the F∞ diallel analysisKey words: barley, Hordeum vulgare, diallels, haploids, epistasis, heterosis.

THE EFFECT OF HAIL DAMAGE ON BARLEY

1979 ◽  
Vol 59 (4) ◽  
pp. 1147-1152 ◽  
Author(s):  
K. M. GILBERTSON ◽  
E. A. HOCKETT
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Yield Loss ◽  
Heading Date ◽  
Yield Losses ◽  
Heading Time ◽  
Hordeum Vulgare L ◽  
Positive Correlation ◽  
Hail Damage ◽  
Final Yield

After a severe hailstorm at Fort Ellis, Montana, an experienced hail insurance adjuster estimated 90–100% damage in replicated yield plots of barley (Hordeum vulgare L.). After harvest, grain yield losses for all 66 entries in the nursery were found to range from 26 to 84%. A group of 11 cultivars selected for further study averaged 55% less than normal yield with a range of 29–82%. Yield and heading date were significantly (P < 0.05) correlated for all cultivars (r = 0.39*, n = 42), within six-rowed cultivars (r = 0.79*, n = 7), and for the 11 selected cultivars (r = 0.62*, n = 11). Although there was no significant correlation between yield and heading date within two-rowed cultivars, a group of two-rowed early isogenics was significantly reduced in grain yield compared to their late counterparts. The number of days between heading and time of hail damage was a better indicator of final yield loss than number of culms remaining (the criterion used for hail-adjuster estimates of damage). Regrowth is more likely to occur in barley if the hail damage is near or before heading time rather than 5–15 days after heading. Therefore, the positive correlation in this test between late heading date and yield is because the later entries had just headed out when the hail came, while the low yielding entries headed 10–15 days before the hailstorm.

Linearity of offspring–parent regression in barley

Genome ◽  
1989 ◽  
Vol 32 (4) ◽  
pp. 719-723
Author(s):  
T. M. Choo
Keyword(s):  
Regression Analysis ◽  
Hordeum Vulgare ◽  
Linear Regression ◽  
Maternal Effects ◽  
Doubled Haploid ◽  
Heading Date ◽  
Mean Square ◽  
Quadratic Regression ◽  
Hordeum Vulgare L ◽  
Hill Plots

A study was conducted to test the linearity of offspring–parent regression in barley. Forty-two F2 familes and 398 F∞ (i.e., doubled haploid) lines were derived from 7 × 7 diallel crosses. The F2 families, F∞ lines, and their parents were evaluated in hill plots with five replications. Three types of regression analysis (F2 family on midparent, F∞ family on midparent, and F∞ line on midparent) were carried out for grain yield, heading date, plant height, and number of spikes per hill. The linear regression mean square was significant in most cases, but the quadratic regression mean square was not significant in all cases. These results suggest that the true regression of offspring on midparent is linear, although dominance, additive × additive epistasis, and maternal effects were detected for the four traits of the same materials in previous studies.Key words: barley, Hordeum vulgare L., curvilinearity, regression, heritability.

GENETIC VARIANCES IN AN EIGHT PARENT HALF DIALLEL OF OATS

1976 ◽  
Vol 18 (3) ◽  
pp. 419-427 ◽  
Author(s):  
D. R. Sampson ◽  
I. Tarumoto
Keyword(s):  
Grain Yield ◽  
Genetic Variance ◽  
Additive Genetic Variance ◽  
Heading Date ◽  
Phenotypic Variance ◽  
Narrow Sense ◽  
Narrow Sense Heritability ◽  
Additive Component ◽  
Tests Of Fit ◽  
Half Diallel

Twenty-eight progenies with their eight parent cultivars of Avena saliva L. (2n = 6x = 42) were grown in F1, F2 and F3 in separate years; the F1 as spaced plants, the F2 and F3 as dense seeded populations. Additive genetic variance constituted most of the phenotypic variance of eight traits (heading date, plant height, stem diameter, grain yield and four components of yield) according to a Griffing Method 4, Model II analysis. Similarly, additive × year interactions were more important than nonadditive × year interactions. A Hayman-Jinks analysis of the same material but with the parents included showed that the additive component was 2 to 16 times larger than the dominance components in the F1 However in the F2 and F3 the dominance components became larger than the additive components for most traits instead of declining in importance as expected. Further, tests of fit to the hypotheses underlying the Hayman-Jinks analysis were negative in 8 of 24 cases. It is postulated that these discrepancies result from epistatic variance which caused an upward bias in the dominance estimates. The calculation and uses of two estimates of narrow-sense heritability are discussed.

scholarly journals Yield Performance of Barley Hybrids (Hordeum vulgare L.) under Drought stress and non-stressed Conditions

passer ◽  
2019 ◽  
Vol 3 (1) ◽  
pp. 107-113
Author(s):  
Yadgar Mahmood ◽  
Halgurd Nasraden Hassan ◽  
Masood Saber Mohammed
Keyword(s):  
Drought Stress ◽  
Hordeum Vulgare ◽  
Grain Yield ◽  
Plant Height ◽  
Harvest Index ◽  
Dry Matter ◽  
Growth And Yield ◽  
Yield Reduction ◽  
Hordeum Vulgare L ◽  
Wide Range

This study was carried out at the experiment field, Kalar Technical Institute, Garmian Region in two growing seasons of 2016-2017 and 2017-2018 in order to evaluate the growth and yield potentials of barley under water stressed using hybrids as a source of wide range of genotypic variations. Therefore, five F2 barley hybrids (Hordeum vulgare L.) were screened for grain yield, biomass dry matter, plant height and harvest index under irrigated and drought conditions. Results showed that there was no effect of drought on grain yield (P>0.05) in 2017, while significantly reduced yield in 2018 and across-year mean (P-2 (3//14) under irrigated condition, and 267.8 (3//5) to 302.3 g m-2 (3//4) under unirrigated condition (P=0.001), biomass dry matter was ranged from 1099.1 (3//1) to 1370.5 g m-2 (3//14) under irrigated condition, and 892.6 (3//1) to 1153.9 g m-2 (3//14) under unirrigated condition (P=0.05), and harvest index were from 25.1 (3//14) to 28.0 (3//1) under irrigated conditions, and 25.9 (3//14) to 31.2 (3//1) under unirrigated conditions (P=0.04). Regression analysis, averaging over years, showed a positive relationship between grain yield and biomass under irrigated (R2=0.76; P=0.05), despite that, any positive relation was not found under unirrigated conditions (R2=0.43; P=0.23) due to post-anthesis drought stress. A strong relationship was also found between plant height and biomass dry matter under both irrigated (R2=0.89; P=0.02) and unirrigated (R2=0.97; P=0.003) conditions due to the high contribution of plant height in increasing plant biomass. It is concluded that genotypes had different response to drought due to their genetic diversity, and relatively low impact of water stress was appeared on growth and grain yield of barley in this semi-arid region compared to worldwide expected range of yield reduction.

scholarly journals A New QTL for Plant Height in Barley (Hordeum vulgare L.) Showing No Negative Effects on Grain Yield

PLoS ONE ◽  
2014 ◽  
Vol 9 (2) ◽  
pp. e90144 ◽  
Author(s):  
Junmei Wang ◽  
Jianming Yang ◽  
Qiaojun Jia ◽  
Jinghuan Zhu ◽  
Yi Shang ◽  
...  
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Plant Height ◽  
Negative Effects ◽  
Hordeum Vulgare L

Using AMMI approach to delineate genotype by environment interaction and stability of barley (Hordeum vulgare L.) genotypes under northern Indian shivalik hill conditions

2020 ◽  
Vol 80 (03) ◽  
Author(s):  
Om Prakash Yadav ◽  
A. K. Razdan ◽  
Bupesh Kumar ◽  
Praveen Singh ◽  
Anjani K. Singh
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Principal Component ◽  
Genotype By Environment Interaction ◽  
Environment Interaction ◽  
Hordeum Vulgare L ◽  
Genotype By Environment ◽  
Biplot Analysis ◽  
Principal Component Axis ◽  
Ammi Analysis

Genotype by environment interaction (GEI) of 18 barley varieties was assessed during two successive rabi crop seasons so as to identify high yielding and stable barley varieties. AMMI analysis showed that genotypes (G), environment (E) and GEI accounted for 1672.35, 78.25 and 20.51 of total variance, respectively. Partitioning of sum of squares due to GEI revealed significance of interaction principal component axis IPCA1 only On the basis of AMMI biplot analysis DWRB 137 (41.03qha–1), RD 2715 (32.54qha–1), BH 902 (37.53qha–1) and RD 2907 (33.29qha–1) exhibited grain yield superiority of 64.45, 30.42, 50.42 and 33.42 per cent, respectively over farmers’ recycled variety (24.43qha–1).

COMPARISON OF HILL AND ROW PLOTS FOR AGRONOMIC AND QUALITY TRAITS IN SPRING MALTING BARLEY (Hordeum vulgare L.)

1990 ◽  
Vol 70 (1) ◽  
pp. 61-69 ◽  
Author(s):  
S. TRAGOONRUNG ◽  
P. M. HAYES ◽  
B. L. JONES
Keyword(s):  
Hordeum Vulgare ◽  
Recurrent Selection ◽  
Agronomic Traits ◽  
Malting Quality ◽  
Quality Traits ◽  
Malting Barley ◽  
Seeding Rate ◽  
Hordeum Vulgare L ◽  
Hill Plot ◽  
Hill Plots

Provided they reliably predict row plot performance, hill plots should be useful for doubled haploid recurrent selection in malting barley (Hordeum vulgare L.). The primary objective of this research was to compare hill and row plot expression of agronomic and malting quality traits in an array of elite spring habit barley germplasm grown under irrigated conditions. A supporting objective was to identify an appropriate seeding rate for hill plot evaluation. Eight-replicate hill plots at four seeding rates (10, 20, 30, and 40 seeds per hill) were compared with adjacent four-replicate row plots in each of three environments. Genotype and genotype × environment interactions were significant for most agronomic traits in both plot types. Significant, linear genotype responses to hill plot seeding rates were observed for most agronomic traits. Seeding rate had no consistent effect on the expression of malting quality. The percentage of lines in common in the two plot types at 25 and 50% selection intensities was the most useful comparison statistic and indicated hill plot selection should be effective for most agronomic and malting quality traits. Although yield heritability estimates were consistently high in both hill and row plots, there was little relationship between trait expression in the two plot types. Differential tillering in response to hill plot competition is likely responsible. A seeding rate of 10 seeds per hill should be appropriate in preliminary screening for traits amenable to hill plot selection in irrigated spring habit malting barley.Key words: Hordeum vulgare L., malting quality, breeding methods, barley

AAC Vitality barley

2016 ◽  
Vol 96 (3) ◽  
pp. 367-370
Author(s):  
Thin Meiw Choo ◽  
Allen G. Xue ◽  
Richard A. Martin
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Spot Blotch ◽  
Research Centre ◽  
Seed Color ◽  
Net Blotch ◽  
Good Resistance ◽  
Hordeum Vulgare L ◽  
Moderately Resistant

AAC Vitality is a six-row spring feed barley (Hordeum vulgare L.) cultivar developed by the Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada. AAC Vitality had high grain yield, good resistance to lodging, and good resistance to straw break. It was late in heading and maturity. Its seed color was bright. AAC Vitality was moderately resistant to net blotch and spot blotch. AAC Vitality performs well in Ontario.

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